This helper extends the core helper and adds a fuction that converts greek letters of a string to uppercase.
Copy MY_string_helper.php to application/helpers folder.
Load string helper:
$this->load->helper('string');
Use it:
$title = 'Τάχιστη αλώπηξ βαφής ψημένη γη - Mary Had A Little Lamb';
echo grstrtoupper($title);
// Result
// ΤΑΧΙΣΤΗ ΑΛΩΠΗΞ ΒΑΦΗΣ ΨΗΜΕΝΗ ΓΗ - MARY HAD A LITTLE LAMB
Copyright (©) 2012 Dimitris Krestos. See LICENSE for details.